In response to the comments about how teachers use them, I have to defend it slightly. While most the teachers who use the font do so because they think it is cute and they have no taste for design, some teachers have a better reason. Unfortunately right now Comic Sans is one of the most recommended fonts for dealing with dyslexia. As a teacher who is somewhat dyslexic, I think it's admirable for people to try to design for all learners. But, I also have a degree in book publishing and design and I have to tell you that I'd be more inclined to design in Wingdings than Comic Sans! There are a handful of professional alternatives to Comic Sans being developed with the goal of making a decent font for dyslexic people that is still attractive to the masses. I look forward to their arrival. If anyone knows of any good free ones already out there, I'd love to test them out.

Comic sans is a great font, when used correctly. There are people that hate its inappropriate use, and there are people that just hate it. I embrace and enjoy when it is actually used correctly (comic books or children's designs). There has been an entire movement to get rid of the font, and then another entire movement to bring it back. You've got to respect how much attention it gets.